The Refcomp SW3H-12500 is a 125 HP semi-hermetic twin-screw refrigeration compressor engineered for cold storage and other demanding refrigeration applications. It combines an optimized asymmetric rotor profile, flexible capacity regulation, and a compact integrated housing to deliver reliable, efficient performance under varying load conditions.
The SW3H-12500 screw type refrigeration compressor uses RefComp's asymmetric 5/6-tooth rotor profile with an optimized length-to-diameter ratio. This design supports smooth rotor engagement, reduces vibration, and helps improve compression efficiency.
Four-step or stepless capacity regulation allows compressor output to follow changing cooling demand. The slide-valve mechanism helps the system respond to partial loads, reducing unnecessary full-capacity operation and improving load matching.
This semi-hermetic screw compressor features optimized internal gas passages that reduce intake resistance and flow losses. Its integrated housing combines key components into a compact arrangement, simplifying equipment layout and system installation.
The built-in 100 μm suction filter captures impurities from incoming refrigerant gas before they reach the motor. This helps reduce internal contamination and protects critical components from foreign particles, supporting cleaner and more reliable compressor operation.
| Model | SW3H-12500 |
|---|---|
| Rated power | 125 HP / 89 kW |
| Displacement (50/60 Hz) | 341 / 409 m³/hr |
| Weight | 545 kg |
| Capacity regulation | 25%, 50%, 75%, 100% 4-step; 25%–100% stepless |
| Standard motor | Y/△ – 400V/3/50Hz – 460V/3/60Hz |
| Star/Delta start current | 318 / 953 A |
| Max operating current | 196 A |
When selecting a screw type refrigeration compressor, provide the required cooling capacity, refrigerant, evaporating and condensing temperatures, power supply, and expected load conditions. These details help verify whether the compressor matches the system's actual operating requirements.
For a refrigeration screw compressor replacement, compare the mounting dimensions, suction and discharge connections, oil-line fittings, and control interfaces. Verify compatibility with the existing refrigeration system before ordering.
Before starting this 125 HP screw compressor, verify that the site power supply matches the motor specifications. Check the star-delta starter wiring, phase sequence, protection circuits, and motor connections against the manufacturer's electrical diagram.
If the INT69 SNY protection module indicates motor overheating, phase loss, or reverse phase sequence, inspect the corresponding electrical and operating conditions. Identify and correct the fault before restarting the screw type refrigeration compressor.
